Trickling-filter floor construction



Jul 15, 1930.

Filed Nov. 15. 1927 2 Sheets-Sheet 1 jwumtoz Jame; 6. Barbour July 15, 1930: .J. G. HARBOUR 1,7 0

' TRIGKLING FILTER FLOOR CONSTRUQIILION Filed Nov. 15, 1927 2 Sheets-Sheet 2 gnwnlio't 4 0/0/1186 Barbvar action and the chemicalreaction of the sew-- Patented July 15, 1930 JAMES e. BARBOUR, or CANTON,

f v wane,

ERICK COMPANY, OF CARTON, OHIO, A GO RPORATION OI OHIO 'rnIcKLInG-FILTEa moon cons'rnucrron Application filed November 15, 1327. Serial No. 233,387.

The invention relates to improvements in false oropen floor construction for trickling filter beds and more particularly to improvements in the trickling filter floorconstruction set forthin-my prior Patent No. 1,601,465,; and the objectsof the present improvements areto providespecial shapes and an arrange ment of the trough tile'and grid blocks by which a permanent floor can be constructed for supportingthe filter bed according to my aforesaid patent.

A trickling filterbed may be made of coarse material such as clinker, gravel or broken stone, through which sewage eflluent may trickle in thin films for aerating and purifying the same before it is: discharged into an open water course. I

In the use of such filters, difficulty iseXperienced inthe accumulation and adhesion of suspended solids and organic vgrowthsiin the open floor and drainage system, which not only prevents the free flow of purified elfiuent therethrough, and may also recontaminate the same, but may requirethe entire filterbed to be removed for cleaningand purifying the floor and drainageopenings.

These difiiculties are accentuated when the floor and drainage structure are made of concrete or other granular or porousmaterial, because the same gives a very good anchorage for fuiigous growth and is also subject to.

disintegration by theordinary physical reage effluent. r

The most desirableand eliioient form of floor construction for such filter beds includes" such structures out of special sha'pedivitreous tile and blocks, which can be laid upon a concrete bed and serve to avoid the difficulties of construction and use which have attended other forms of fioor-construct1on.

A preferred embodiment of the present 1nvention is illustrated in the accompanying drawings forming-part hereof, in which- Figure 1 isan elevation section 'a'longone: of the drainagetroughs ShOW'111g th6 grid blocks in cross section;

Fig. 2, 'a fragmentary perspective View showing details of the floor construction;

, Fig. 3, av detached perspective viewot' one grid block; Fig. 4, a detached perspective View of one trough tile; r 7 f r i Similar numerals refer throughout the drawings. V 1

A cement-or concrete-bed 6 may firstbe laid upon the ground, and the same should be of suliicientthickness and upon a suitable foundation for supportingthe entire load of the floor structure vand filter bed imposed upon it; 7 g The surfaceit'i oft-he concrete bedshould be finished in a smooth'plane,zwith a suficient' to similar parts slope or inclination lengthwise of the drain age troughs 7 toinsure a proinpt and free. How or purified; efiuent along the same, to a the present invention,'theseblocks aremade with a wide flat-bottom wall 9 and relatively narrow fiat top walls 9", l/Vhen these tile are laidend to end, thcy form a series of For the particular purpose of the :present invention, the trough tile are made of vitreous NT eaamEi OHIO, AssIeNon To THE METROPOLITAN' ravine laterally spaced pier supports for the end set I material, with the wide bottom wall formed full width of the'tile for bearing upon the flat face of the concrete bed, and to facilitate the forming, drying and burning of the same,

they may be provided with a plurality of longitudinal openings 11, which also serve to 'reduce'the material and weight of the tile.

Between the narrow fiat-top walls 9? of each trough block 9 a trough wall 9 extends and is provided with a concave exterior surface for forming a trough 7; I

The troughs which are formedxby the tile'are thus given the proper concave cross section, which is necessary to insure the most efiicient flow of the sewage efiiuent through and along the troughs.

it has heretofore been sought to provide spaced bearin supports for the ends. of various kinds of floor brick by forminga series of spaced piers of concrete upon the concrete bed, but this practice encounters the diiiiculty in forming the bearing top of such a rib without a sufiiciently uniform fiat surface for-properly supporting the ends ofthe floor brick, accompanied by a breaking or fracture of the edges of the bearing surface.

A further ditliculty is experienced when concrete or other kinds of piers are made with straight upright sides forming a normal angle at the base or" each side 01 the pier, which is objectionable in a sewage drainage trough because of the accumulation and adhesion of suspended solids and organic growths therein.

By forming spaced supporting piers of series of trough tiles made as described here in, the same can be readily laid, one at a time, upon the flat face of the concrete bed, by the use of a thin layer out cement mortar in case of need; so that the narrow tops 9 of the trough tiles will -form a continuous and uniform fiat bearing support for the ends of the grid blocks, which can be laid directly upon he bearing topsof the trough tiles without the necessity of usingany mortar tor leveling up the bearing surface of the spaced piers. I

Each grid block 10 is preferably made with fiat faces and upright end walls 10 at each end, and a plurality of upright longitudinal walls ltl and 10 and 10"" extending between uhe end walls, and spaced apart so as to form a slotted longitudinal opening 10 between adjacent longitudinal walls.

The preferred form 01 making the grid blocks is to locate one of the longitudinal walls l0 flush with the ends of the end walls 10 and to locate another one of the longitudinal walls 10 at an interval within the other end of the end walls 10 equal to the .spacebetween adjacent longitudinal walls,

as shown in Fig. 3, so that when a series of grid blocks are laid side by side upon the trough blocks, a flat floor is formed With a uniform series of slotted openings 10 between the longitudinal walls extending across the trough below, as shown in Fig. 2.

The width of the slotted openings 10 is such as to prevent thelarger pieces of drainage material 12 from passing through the same, so that the lower layer of filtering material 12 is properly supported upon the floor, while the smaller pieces 13 of the filtering material areproperly supported on the larger pieces thereof; through all of which the sewage effluent may be filtered in. well known manner. A

As shown in Fig. 1, a series of supply pipes lt may be built in concrete standards 15, from which a series of riser pipes 14 may extend upward with suitable nozzle 16 on their ends for properly spraying a supply of sewage etiluent upon the filter bed, in well known manner. When this construction is used, the concrete piers are provided with suitable passages or ports 15' in line with the troughs 7, so as not to stop the flow of grated by ordinary physical reaction or the chemical reaction oi the sewage.

When made in the manner and of the material described herein, the floor construction under a trickling filter can be used continuously for a long series of years, without removing the filtering material for cleaning the openings in the floor and drainage structure.

I claim:

l. A hollow trough tile for a trickling filter floor made of vitreous material and formed with a flat wide base wall, side walls extending upward from the side edges of the base wall, top walls extending inward from the top edges of the side walls, and a concave trough wall extending continuously between the top walls. A f I 2. A hollow trough tile for a trickling filter floor made of vitreous materialand formed with a flat wide base wall, side walls extend ing upward from the side edgesof the base wall, relatively narrow top walls extending inward from the top edges'of the side walls, and a concave trough wall extending continuously between the top walls.

3. A hollow trough tile fora trickling filter floor made of vitreous material and formed with a flat wide base wall, side walls extending upward from the side edges of the base wall, relatively narrow fiat top walls extending inward from ,thetop edges of the side walls, and a concave trough wall extending continuously between the top walls.

4. A trickling filter 'fioor made of hollow trough tiles having fiat wide base walls, side walls extending upward from the side edges of the base walls, top walls extending inward from the top edges of the side walls, and a concave trough wall extending continuously between the top walls, the tile being laid end to end and sideby side, the adjacent top walls forming supporting piers and the concave trough walls forming intervening troughs between the supporting piers, and grid-blocks laid err-the piers and spanning the troughs between them. Y

5. A trickling filter floor including a fiat face concrete bed, series of hollow vitreous tiles laid end to end andside by side to form supporting piers and intervening troughs,

the bottoms of the tiles being formed of wide fiat base walls to bear full widthof the tile upon the flat face of the concrete bed,.s-ide walls extending upward from the side edges of each base wall, top walls extending inward from the top edges of each side wall to form with adjacent tiletop walls the pier tops, "a concave trough wall extending continuously between the top walls of each tile to form the troughs, and fiat face vitreous grid blocks laid on the iers s annin the trou hs 130-.

tween the piers and forming a Hatfloor.

6. A trickling filter floor including a fiat face concrete bed, series of hollow vitreous tiles laid end to end and side by side to form supporting piers and intervening troughs,

the bottoms of the tiles being formed of-wide flat base walls to bear full width of the tile upon the fiat face of the concrete bed, side walls extending upward from the side edges of each basewall, top Walls ext-endlng inward from the top edges of each side wall to torm with adjacent tile top walls the pier tops, a

concave trough wall extending continuously between the top walls of each tile to form the troughs, and flat face vitreous grid blocks laid on the piers spanning the tr0ughsbe tween the piers and forming a flat floor, there 7 beingseries of slotted openings in the grid blocks extending across the troughs formed by the pier tilesbelow said grid blocks;

In testimony that I claim the above, I have hereunto subscribed my name. 7

JAMES HARBOUR. 

